232 NOTODONTINA [XANTHORHOE 



Britain to Ross (except EC. England), local ; NO. and 

 mountains of C. Europe, NW. Asia ; 7, 8. Larva pale ochreous, 

 marked with darker brown ; dorsal, subdorsal, and lateral lines 

 dark brown, interrupted on 5-9 : on Galium ; 9-5. 



18. X. viridaria, F. (pectinataria, Kn. ; miaria, Bkh.) 24-28 

 mm. Fore wings green ; basal patch and median band darker 

 or brownish towards edges, edges partly black, white-margined, 

 forming triangular black spots on costa, and sometimes 

 thickened on dorsum, anterior edge of median band twice 

 angulated, posterior with short bidentate median projection ; a 

 darker discal mark ; subterminal line whitish ; a blackish apical 

 streak. Hindwings grey, with pale double postmedian and 

 subterminal lines. 



Britain to the Orkneys, Ireland, very common ; N. and C. 

 Europe, NW. Asia ; 5, 6. Larva rather stout, reddish-ochreous, 

 marked with dark fuscous ; dorsal line dark, interrupted ; a 

 series of five light V-shaped marks : on Galium ; 8-4. 



23. RHODOMETRA, Meyr. 



Face forming an obtuse prominence. Antennae in $ 

 bipectinated, apex simple. Palpi loosely scaled. Fore wings : 

 areole simple. Hindwings : 8 anastomosing with cell to beyond 

 middle. 



A small European and African genus. 



1. R. sacraria, L. 22-24 mm. Forewings pale yellow, some- 

 times rosy-tinged ; costa rosy -purple towards base ; a straight 

 purple or brown -reddish streak from costa before apex to 

 dorsum at f . Hindwings yellow-whitish. 



England to Lancashire, Perth, a casual immigrant only ; S. 

 Europe, SW. Asia to N. India, Africa; 7, 8. Larva green; 

 dorsal line pale, edged with ferruginous lines, after 5 forming 

 V-shaped marks enclosing yellow-white spots; spiracular 

 yellowish -green on 2-4 and 11-13; spiracles reddish; head 

 pale brownish -red ; prolegs pink : on Rumex, Antkemis, etc. ; 

 9-5. 



24. LYTHRIA, Hb. 



Face rough-haired or loosely scaled. Antennae in $ bipec- 

 tinated, apex sometimes simple. Palpi with long rough hairs. 

 Thorax roughly hairy beneath. Forewings : areole simple. 

 Hindwings : 8 anastomosing with cell to beyond middle. 



A small genus, occurring in Europe and New Zealand. 



1. L. purpuraria, L. 22-26 mm. Forewings olive -brown or 



